Zynga interview questions

I applied online. The interview process took 3 weeks from start to finish. The interview process consisted of the following: applied online via LinkedIn, intro interview with recruiter, phone screen with technical management, group/panel interview with hiring team and management, and offer extension a few days afterwards.

Interview consisted of 3 rounds( All rounds are elimination rounds). First round is conducted by senior software engineer followed by Principle Engineer and last round is taken by Director of Engineering. Round 1- Given a node in BST along with it's parent node, find its previous and next node using inorder traversal. Round 2- Design and code minesweeper game. Round 3- Given an array of unique positive integers return k maximum integers. Given an array of strings, group anagrams together. Given root node, print the zig zag order traversal of the binary tree.